different aromatic compounds 1a–1t with iodine and a mercury(II)-salt 2 [mercury(II) chloride, nitrate or triflate] (1:1:1 molar ratio) in dichloromethane at room temperature leads to the corresponding iodoarene 3, the obtained regiochemistry being the expected. Concerning the mercury(II) salt, the observed reactivity decreased in the series triflate&>nitrate&>chloride according to their ionic character.
Bachki Abderrazak, Foubelo Francisco, Yus Miguel, Tetrahedron, 50 (1994) N 17, S 5139-5146
作者:Bachki Abderrazak, Foubelo Francisco, Yus Miguel
DOI:——
日期:——
Pd‐Senphos Catalyzed
<i>trans</i>
‐Selective Cyanoboration of 1,3‐Enynes
作者:Yuanzhe Zhang、Bo Li、Shih‐Yuan Liu
DOI:10.1002/anie.202005882
日期:2020.9.7
The first trans‐selective cyanoboration reaction of an alkyne, specifically a 1,3‐enyne, is described. The reported palladium‐catalyzed cyanoboration of 1,3‐enynes is site‐, regio‐, and diastereoselective, and is uniquely enabled by the 1,4‐azaborine‐based Senphos ligand structure. Tetra‐substituted alkenyl nitriles are obtained providing useful boron‐dienenitrile building blocks that can be further